have you already entered mobile number or you want to add/change mobile number from your facebook account. So you can know how to do this from this article.
How to Know/Add/Change/Remove Mobile Number
- Login in Facebook Account first.
- Then go to Profile section then click on Edit Profile.
- Find Contact Info section then know/add/change/remove Mobile Number or Email ID.
Have another issue in Facebook, So read more article about Facebook.
